How this force of the same magnitude and direction should be applied that the box only slides or only topples?

When an acrobat walks on a tightrope, she extends her arms straight out from her sides. She does this to make it easier for her to catch herself if she should tip to one side or the other. Explain how this works.

What happens if the box were to start from rest at the top of the slope?

How is force distributed across a spherical object, like a knee cap?

Would the friction between the roller and plane not act in the opposite direction as friction opposes motion?

A baseball pitcher throws the ball in a motion where there is rotation of the forearm about the elbow joint as well as other movements.

101. A 50.0-g meter stick is balanced at its midpoint (50.0 cm). Then a 0.100-kg and a 0.200-kg mass are hung with light string from the 10.0-cm and 70.0-cm points, respectively. (Figure 8-59). Calculate the clockwise and coun- terclockwise torques acting on the board due to the four forces shown about an axis pointing out of the page at the following points: (a) the 0-cm point, (b) the 50-cm point, and (c) the 100-cm point. (d) Is the meter stick still balanced after the two masses have been added? Example 8-17 10.0 cm actuall 0.100 kg Figure 8-59 Problem 101 F pivot 50.0 cm m stick& 70.0 cm 0.200 kg

John jumps up in the air to block a shot. After he is off the ground, John raises his hands over his head. Explainhow this action affects the flight path of his center of gravity.

What is rotational non-impulse?